Intel Core Ultra X7 358H vs Intel Processor U300L Comparison

The Verdict

The data indicates a decisive performance advantage for the Intel Core Ultra X7 358H. With a 16-core, 16-thread configuration and an average benchmark score of 40967, it ranks in the 87th percentile of all CPUs in the database. In contrast, the Intel Processor U300L, with 5 cores and 6 threads, holds a 50th percentile ranking and has no recorded average benchmark score. The Core Ultra X7 358H is positioned for demanding multi-threaded workloads, while the U300L is a lower-power entry-level part. The benchmark results indicate that the Core Ultra X7 358H sits within a tight performance cluster, trailing the AMD Ryzen AI 5 PRO 440 by 0.6%, the Intel Core Ultra 7 356H by 0.6%, and the Intel Core Ultra 7 366H by 0.7%, while leading the AMD Ryzen AI 5 PRO 435G by 0.6%. The U300L, lacking recorded benchmarks, cannot be directly compared on the same scale.

Architecture Differences

The two processors come from entirely different design generations. The Intel Core Ultra X7 358H is codenamed Panther Lake and belongs to the Core Ultra Series 3, built on Intel's 3 nm process. It features a hybrid architecture with 16 cores and 16 threads, designed for the Panther Lake-H mobile platform. The Intel Processor U300L is codenamed Raptor Lake-PS, based on the Raptor Lake architecture, and is manufactured on a 10 nm process. This older node and design yield a much smaller core count: 5 cores and 6 threads.

The cache hierarchy differs substantially. The Core Ultra X7 358H provides 192 KB of L1 cache per core, 3 MB of L2 cache per core, and 18 MB of shared L3 cache. The U300L offers 80 KB of L1 per core, 1.25 MB of L2 per core, and 8 MB of shared L3. The Core Ultra part thus has more than double the shared L3 capacity and significantly larger per-core L2. The memory controllers also diverge: the Core Ultra X7 358H supports LPDDR5X memory over a dual-channel bus with a recorded bandwidth of 153.6 GB/s, while the U300L supports both DDR4 and DDR5 over a dual-channel bus, with no bandwidth figure recorded. The integrated graphics differ as well, with the Core Ultra X7 358H featuring Arc B390 graphics and the U300L using UHD Graphics 48EU. PCIe connectivity also separates them: the Core Ultra supports Gen 5 with 4 CPU lanes, while the U300L uses Gen 4 with 8 CPU lanes. The Core Ultra X7 358H uses the Intel BGA 2540 socket, whereas the U300L uses Intel Socket 1700.

FAQ

Q: Which processor has more cores and threads?

A: The Intel Core Ultra X7 358H has 16 cores and 16 threads. The Intel Processor U300L has 5 cores and 6 threads.

Q: What are the maximum boost clock speeds?

A: The Core Ultra X7 358H boosts up to 4.80 GHz, while the U300L boosts up to 4.40 GHz. The base clocks are 1.90 GHz and 1.20 GHz, respectively.

Q: How do their thermal design power ratings compare?

A: The Core Ultra X7 358H has a TDP of 25 watts. The U300L has a TDP of 15 watts.

Q: Which processor uses a newer manufacturing process?

A: The Core Ultra X7 358H is built on a 3 nm process. The U300L is built on a 10 nm process.

Q: What is the difference in L3 cache capacity?

A: The Core Ultra X7 358H has 18 MB of shared L3 cache. The U300L has 8 MB of shared L3 cache.

Q: How does the Core Ultra X7 358H compare to its nearest rivals?

A: The Core Ultra X7 358H is 0.6% slower than the AMD Ryzen AI 5 PRO 440, 0.6% slower than the Intel Core Ultra 7 356H, 0.7% slower than the Intel Core Ultra 7 366H, and 0.6% faster than the AMD Ryzen AI 5 PRO 435G.

Specification Differences

The two processors differ across nearly every core specification. The Core Ultra X7 358H has 16 cores and 16 threads, while the U300L has 5 cores and 6 threads. Base clock speeds are 1.90 GHz versus 1.20 GHz, and boost clocks are 4.80 GHz versus 4.40 GHz. TDP ratings are 25 watts versus 15 watts. The Core Ultra X7 358H is built on a 3 nm process, while the U300L uses a 10 nm process. Cache allocations differ: the Core Ultra has 192 KB L1 per core, 3 MB L2 per core, and 18 MB shared L3, compared to 80 KB L1 per core, 1.25 MB L2 per core, and 8 MB shared L3 for the U300L. Memory support is LPDDR5X for the Core Ultra versus DDR4 and DDR5 for the U300L. The Core Ultra records a memory bandwidth of 153.6 GB/s, while the U300L has no recorded bandwidth. PCIe support is Gen 5 with 4 lanes for the Core Ultra versus Gen 4 with 8 lanes for the U300L. Integrated graphics are Arc B390 on the Core Ultra and UHD Graphics 48EU on the U300L. Sockets are Intel BGA 2540 and Intel Socket 1700, respectively. The Core Ultra X7 358H has a release date of 2026-01-04, while the U300L has a release date of 2024-04-07. The U300L has a launch MSRP of $107. The Core Ultra X7 358H has no recorded launch MSRP.

Head-to-Head Benchmarks

The head-to-head benchmark comparison table is empty, meaning no direct benchmark scores were recorded for the Intel Processor U300L against the Core Ultra X7 358H. However, the Core Ultra X7 358H has a full suite of recorded benchmark scores, while the U300L has none. The Core Ultra X7 358H achieves a Cinebench R15 multicore score of 3027 and a single-core score of 301.5. In Cinebench R20, it scores 12011 multicore and 1695 single-core. Cinebench R23 results show 18747 multicore and 2080 single-core. Passmark tests further quantify its capabilities: data compression scores 332508, data encryption scores 26046, extended instructions score 27274, floating point math scores 103842, integer math scores 83147, multithread scores 33802, physics scores 3021, random string sorting scores 40357, and single-thread scores 4124. The find prime numbers test records a score of 337. The average benchmark score across all recorded tests is 40967.

Since the U300L has no recorded benchmark scores, no direct wins can be assigned. The Core Ultra X7 358H holds all measured performance data in this comparison. Its percentile ranking of 87 versus the U300L's 50 indicates a substantial gap in overall performance positioning within the database.

Where Each One Wins

The Intel Core Ultra X7 358H wins across all measurable performance categories. Its 16-core, 16-thread configuration with a 4.80 GHz boost clock and 18 MB of L3 cache delivers scores that place it in the 87th percentile of all CPUs. The Cinebench R23 multicore score of 18747 and Passmark multithread score of 33802 indicate strong parallel processing capability, making it suitable for rendering, compilation, and other multi-threaded tasks. The single-core Cinebench R23 score of 2080 and Passmark single-thread score of 4124 also show competitive single-thread performance for this class of processor.

The Intel Processor U300L has no recorded benchmarks, so its wins cannot be quantified from the data. Its 15-watt TDP is lower than the Core Ultra's 25 watts, indicating a more power-efficient design on paper, but no performance data exists to assess its execution capabilities. Its support for both DDR4 and DDR5 memory and its Gen 4 PCIe with 8 lanes could offer platform flexibility, but these are specification-level differences, not measured performance wins. The U300L also has a recorded launch MSRP of $107, a detail not available for the Core Ultra X7 358H.

The data shows that the Core Ultra X7 358H is the only one of the two with recorded performance results. Its nearest rivals, the AMD Ryzen AI 5 PRO 440 and Intel Core Ultra 7 356H, both score within 0.6% of its average, indicating that the Core Ultra X7 358H performs in a narrow band around those established mobile processors. The Intel Core Ultra 7 366H is 0.7% ahead, while the AMD Ryzen AI 5 PRO 435G is 0.6% behind. These margins are small, placing the Core Ultra X7 358H in a tightly contested performance tier. For any workload requiring measured computational throughput, the Core Ultra X7 358H is the only option with data supporting its capability. The U300L remains a specification-only entry with no benchmark evidence in the database.